1 files changed, 5 insertions, 0 deletions
diff --git a/bpf.c b/bpf.c
index e130850..d8bf46c 100644
--- a/bpf.c
+++ b/bpf.c
@@ -236,6 +236,11 @@ size_t bpf_arg_comp(struct sock_filter **pfilter, int op, int argidx,
 				unsigned char jt, unsigned char jf);
 	int flip = 0;
 
+	if (!filter) {
+		*pfilter = NULL;
+		return 0;
+	}
+
 	/* Load arg */
 	curr_block += bpf_load_arg(curr_block, argidx);